Alvis Speed 25:TRANSMISSION:"single plate clutch, separate 4-speed gearbox all-silent and all-syncromesh, centre change lever, open tubular propellor shaft with metal joints , spiral bevel fully floating back axle"####Alvis Speed 25:ENGINE:Straight-six engine
Alvis Speed 25 has a straight-six engine and it's transmission system comprises a single plate clutch, separate 4-speed gearbox all-silent and all-syncromesh, centre change lever, open tubular propellor shaft with metal joints and spiral bevel fully floating back axle.